iOS 13.4.5 (build 17F5034c) is an official Apple over-the-air update for the iPhone 6s, released on 2020-03-31T17:20:26Z. The update package is 311.74 MB. This is a delta (partial) update that requires 13.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1f95a95f36f0419589b078ee65307b6e37c0a2d4.zip.